Coffee creamer is a synthetic food substance used as a milk alternative, and it is typically plant-based. Most common coffee creamers contain plant-based ingredients such as corn syrup, vegetable liquids, and some creamers include fats extracted from soybeans as a substitute for milk fats. Coffee creamer is used to add smoothness and texture to coffee without adding milk, making it a suitable option for those who prefer plant-based alternatives or those who have milk allergies.